Hot-air furnace.



No'. ssa,|9|. Patented nec. 4, |900. J. H. MoNTGoMEnY.

HOT AIR FURNAGE.

(Appuceibn med Aug. 1s, 1900.)

(No Model.)

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UNITED STATESy PATENT OFFICE.

JOHN H. MONTGOMERY, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF i TO CHARLES F. HAANEL, OF SAME PLACE.

HOT-AIR FU RN'AC E.

SPECIFICATION forming part of Letters Patent No. 663,191, dated December 4, 1900.

Application filed August 13.1900. Serial No. 26.775. (No model.)

To all whom t may concern.-

Beit known that I, JOHN H. MONTGOMERY,

` of the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Hot-Air Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

This invention relates to hot-air furnaces; and it consists of the novel construction, combination, and arrangement of parts hereinafter shown, described, and claimed.

Figure 1 is a longitudinal sectional view showing'the interior arrangement of my improved furnace. Fig. 2 is a cross-sectional view. Fig. 3 is a horizontal sectional view taken on the line a a of Fig. 1.

Referring to the drawings, 1 indicates the house-wall7 and 2 Athe walls of the furnace. As shown, the house-wall constitutes one side of the furnace, and the products of combustion pass from the furnace out through an outlet 3 through the house-wall.

At one side of the furnace is a fire-box 4, to the rear of,which is an air-receptacle formed by means of a metallic covering 5, and within the air-receptacle, adjacent to the fire-box, is a water-receptacle 6, which is provided for the purpose of adding greater humidity to the air when needed. Water is admitted into the water-receptacle through the conductingpipe 7, whichis automatically closed by means vof an ordinary valve connected to the rod S and the iioat 9. The air is admitted into the air-receptacle through one of the walls 2 by means of an opening 10.

Through the top of the cover 5 at suitable distances from each other are openings l1, and integral with the upper surface of the cover 5 around the said openings are Iianges 12. Air-pipes 13 are supported above the cover 5, their lower ends being enlarged, as indicatedby 14, the enlarged portion being for the purpose of receiving the flanges 12. The portions 14 are made to form a close joint with the flanges 12, thereby prohibiting the passage of any dust or gas into the air-pipe. The pipes 13 project upwardly a suitable distance and are provided with the enlarged portions 15 at their upper ends, which encircle the flanges 16 integral with the bottom of the airfchamber -17, the said flanges being arranged around the openings 18. By this means the air is allowed to pass to the openings 11 into the pipes 13 upwardly into the air-chamber 17.' The air-chamber 17 is rigidly supported in position by means of the lateral anges 19, which are built into the side walls of the furnace. The flanges also serve to deflect the heat and cause the same to pass entirely around the air-chamber 17 thereby exposing the same to greater heat and at the same time thoroughly heating the pipes 13. Through the top of the chamber 17 are openings 20, and leading upwardly from the openings are the air-conducting pipes 21, their upper ends being connected to a second air-cham ber 22. The connection between the pipe 21 and the chambers 17 and 22 is similar to the connection formed between the pipes 13 and the receptacles 5 and 17, a close connection being formed to prevent the passage of any gas or dust into the air-conducting pipes. The air after passing into the receptacle 22 is deflected rearwardly and passes upwardly and is distributed to the desired places by means of suitable outlet-pipes 23.

On some occasions and in case greater humidity may be required the forward end of the covering 5 may be made of copper or other suitable heat-conducting material, thereby subjecting the water-receptacle to greater heat and causing a greater amount of the water to evaporate.

A furnace constructed as described subjects the entire surface of the air-chambers to the direct heat of the furnace, there being no cooling surfaces exposed. Very close joints are formed between the conductingpipes and the air-chambers, thereby prohibiting any dust or gas from entering into the heated air and at the same time allowing the different parts to maintain their free con? traction and expansion. Those parts that are subjected directly to the most intense heat may, if necessary, be insulated, thereby preventing them from cracking or becomingk otherwise injured. The heat being caused to circulate among the air-conducting pipes before their passage from the furnace adds a much greater amount of heat than can be done where the furnace is inclosed by a jacket,

IOO

and the middle air-chamber being supported Within thefurnace and subjected to heat from above'and below constitutes an additional advantage. The means of increasing the humidity of the heated air adds a greater convenience than can be provided in any furnace of ordinary construction and gives tothe entire furnace an additional value. In this and other respects the furnace possesses superior advantages.

I claiml. A furnace comprising suitable inclosing Walls, a nre-box` arranged Within said Walls, an air-receptacle Within the said Walls close to the fire-box, an air-heating chamber supported Within the said wa'lls above the fireboX, and eonnectedto the sides and front of the furnace and disconnected from the rear,

means for conducting the air `from the air-receptacle through the fire-box to the vheatingchamber, and means for conducting the heatond receptacle, the said pipes passing through the passage for the products of combustion, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN H. MONTGOMERY.

Witnesses:

ALFRED A. EIC-Ks, J. D. RIPPEY. 

